Qualitative Follow-up Interviews Participants who were enrolled in the project after May 20, 2013 and who had not yet completed their participation in the study were invited to participate in a fourth 60-minute semi-structured qualitative interview. The purpose of the interview was to gain a deeper understanding of participants' intentions, attitudes and behaviors related to aggression as well as their experiences and perceptions of the intervention (experimental girls only), the study, and other mental health services that they have received. The qualitative interview was administered to participants (n=24) at the most convenient location for them, including their residence, Washington University, or at our collaborating agency (Children's Advocacy Services).